Inclosed core for tires.



Patented Feb. 4, 1913.

J. M. MILLER. INGLOSED CORE FOR TIRES. APPLICATION FILED FEB. 29, 1912.AMES M. MILLER, OF WASHINGTON, DISTRICT OF COLUIY'JZBIiL. I

INCLOSED CORE FOR TIRES.

Application filed February 29, 1912.

To all whom it may concern Be it known that I, James M. MILLER,

a citizen of the United States, residing at \Vashington, District ofColumbia, have invented certain new and useful Improvements in InclosedCores for Tires, of which the following is a specification.

The invention relates to an improvement in inclosed cores for tiresofthat type including a separable inner section and an outer casing, andis more particularly directed to the inner section which is constructedto-provide a full necessary resili' ency without the'necessity ofinflation.

The main object of the present invention is the provision of an innertire section adapted for cooperation with and for ready insertion in andremovable from any usual type of outer casing and said inner sectionbeing of a non-inflatable type and constructed to provide open airchambers and resilient brace walls.

A further object of the invention is the provision of an inner sectionincluding a radially disposed and transverse bracewall connected bylongitudinal centrally disposed struts, said :bracewalls being ofgradually increasing thickness from their free ends towardtheir'centralpoint, whereby to provide the maximum thickness of material atthe main point of strain.

A further object of the invention is the provision of a tire in whichthe space between the brace walls on opposite sides of the central strutprovides air cells which when the section is in place on the outercasingforms a series of air chambers for adding to the resiliency of thetire.

A further object of the invention is the constructing of a juncturebetween the struts and brace walls in a manner to avoid an angularrelation of adjacent surfaces, orin other words to provide suchjunctureon the full regular curve from the surface of the brace walls to theadjacent. surface of the struts, whereby to avoid the tendency to abreakage or cracking of the material under the strain, incident to theuse of the tire.

A further object of the inventionis the provision of an auxiliary strippreferably a non-conductor of heat inorder to avoid the heating of theinner section incident to the friction'in use, Said strip being securedin place in a simple convenient manner to prevent wrinkling, and thesecuring means being further utilized as an abutment for theSpecification of Letters Patent.

Patented Feb.4,1913.

erial No. 680,725.

ends of the section to prevent creeping of I the latter when in place.

The invention in the preferred details of construction will be describedinthe following particularly to the accompanying. drawings in which:

Figure 1 is a broken perspective view illustrating the improved tireconstruction. Fig. 2 is a transverse section, through the inner casing,the non-conducting strip being shown in place, the section being takenon the line 52-42 of Fig. 3. Fig. 3 is a broken horizontal sectionalview on the line- 3-3 of Fig. 2. Fig. 4 is a view inelevation partly insection of the inner section-inns trating particularly the means forsecuring the non-conducting strip in place and for preventing creepingof the inner section. Fig. 5 is a section on line 5-5 of Fig. 4. Fig. 6isv a broken elevation of 'the inner section showing a slightly modifiedconstruction.

Referring particularly to the accompanying drawings, wherein likereference nu-v merals give like parts throughout the improved innersection 1 comprises a resilient non-inflatable link of suitablematerial, as rubber or the like, and normally of a size tospecification, reference being had* fit snugly within any usual orpreferred.

type or outer casing 2.

The inner section. 1 is in effect a solid.

section. formed at suitable and appropriate mtervals throughout itscircumferential length and on opposite sides of a central longitudinalline with openings 3 which may be hereinafter termed the air cells.These openings are formed in the casing ofthe section or by otherappropriate operation and are so disposed and 'ofsuch size as toleavebetweeneach of said openings in iongitudinal alinement what maybe termeda brace wall 4, between each pa'ir of openings in transverse alinementwhatmay be termed the'longitudi-nal strut Thus constructed the innersection presents a longitudinal strut 5 extendingthroughout the lengthof the section and a series of brace walls 4 extending from suchv strutsat-right 'angles thereto and radiallyof the section when. in

tire form relation.

With reference to Fig. 3 it will be noted.

that each brace wall has its minimum width at its free or-outer endandfrom such point is gradually increased in thickness toward. the strut5, until atits juncture with such .ness than the solid portions of saidsection beyond 'such point, whereby the section is materially,reinforced at its point of greatest strain. i

'Another and material point in the constru'ction of sections of thistype s provided for in the present improvement in that sharp corners orangular relations of adjacent interior surfaces is avoided. This isparticularly plain in Figs. 2 and 3 of the rawing's wherein it will benoted that thejunctureof each bridge wall with the 'ad- 'acent strutpresents a round surface as at .while the 'unctureof the bridge wallsand strut with t e upper or relatively outer rim portion 8 of thesection is also rounded as at 9. Therefore in the strain incident of thecompression of the section in the use of the tire there is a uniformyielding and bending of the material and the tendency to fracture,otherwise incident to sharp corners the angularly disposed adjacentsurface is entirely avoided. v I

The openings 3 are preferably of oval configuration'having a length ontheir major axissomewhat greater than the similar dimension of thesection and are preferably offset from the central line of the sectionso that the inner ed e of theopening is nearer the proximate e go of thesection that is the outer wall of the opening to the outer edge ofthesection. This provides a thick outer rim or treadportion 8 of thesection and'a comparatively thin inner or felly portion'10. l

In order to avoid theheating of the section and the friction of theouter casing in use I- prefer to provlde a non-conducting strip 11,preferably of silk cut bias to enable it to con orm to the section. Thisstrip .is practically coextensive with the outer surface of the rim ortread portion 8 of the 'S6Ctl0!1, and is designed to snugly fit betweensaid surface and the inner surface of 'the casing 2.

strip and is to be inserted in the tire by anendwise movement, and underthese condi tions means .must be provided for clamping thenon-conducting strip in place and for preventing endwise movement of thesection 1n the outer casing, Such means is illustrated more particularlyin Figs. 4 and 5 and comprises a threaded bolt 12 designed to be passedthrough the felly 13 and rim 141 of the wheel this boltfor the greaterportion of its'length being split to provide sections 15 and 16. At'theinner end the terminals of thesecti'ons-lti and 16 are formed to providecreeping plates 17 preferably offan shape and formed in any appropriateway 'to securely grip the non-conducting material. For example, theterminals of the sections may be inwardly turned and formed to providespurs, andfithe proximate surface of such plates may be. roughened orotherwise formed. In the use of this securing means the ends of thenon-conducting strip 11, after such strip and section have been placedin the tire in the outer casing, are

brought down between the ends of the section and passed between thecreeping plates 17. After the outer casing is secured in place in thering 14, the bolt having been passed in the usual opening in the rim anut 18 is tightened on the bolt to draw the non-conducting' strip snuglyand smoothly in place, as will be apparent from Fi 4.

When in place, as shown in Fig. 4 it wi 1 be notedthat the wing platesserve as an abutment and prevent endwisc movement of the inner sectionin the casing.

If desired the clamping nut' 19 may be arranged on the bolt 12 betweenthe abutting ends of the inner section to morev effectively insure aclamping cooperation of the wings on the non-conducting strip, in

which construction it will be understood 'that the nut 19 is tightenedto clamp the parts prior to the insertion of the bolt 12 through theopening in the Ielly.

In Fig. 6 Thave illustrated a slightly modified form designed to providefor convenient assembling of the section in tire forming relation wherean extremely long straight length is used. In order to adapt suchstraight length for convenient and regular bending into circular form Icut the inner rim portion 10 of the section on radial lines as at 20cutting from the tire inverted -V shaped portions to permit theconvenient bending of the length into .circnlar'form without unduestrain or compression on any part;

Tn all the forms of the tire section shown it is to be noted that Iprovide a non-inflatable inner tube that is arranged on the inside ofany usual or preferred type of outer casing. one that does not in anyway require inflation or other attention to pro vide the desiredresiliency and one which by reason of such advantage is certainly freeof liability of punctures, blowout-s, or similar troubles which areincident to the usual, inflatable inner tube, and as there is. nointernal pressure on the outer tire casing,

due to inflation, ausing blowouts, the durability of the outer tirecasing is prolonged untilactually worn down by traction alone. Furtherinore the formation of the brace walls gives the maximum strengthand the size desired; the rounded contours of meeting points of surfacessubjected to strain prevents breakage or rupture; and the use of thenon-conducting strip materially m-' creases the life of the section bypreventing heat thereof. a

Having thus described my invention, what I claim is 1. A detachable andnon-inflatable inner tire section comprising a length of material,formed with central longitudinal web and with openings extending fromthe sides to but not through said web,a portion of the material of thesection being cut away in line with the major axis of each opening andextending from the upper end of the opening'to and through the bottomedge of the section to permit the bending of the section into circularform while preserving the noilgmal'contour of the openings and centralwe 2. An inner tire section comprising an approximately solid length ofresilient material formed to provide a series of aircells therein, thematerial between said cells providing transverse bridge walls andlontudinal -webs, each of said bridge walls aving a comparatively narrowmar al edge at each side of the section and being of graduallyincreasing width from each of said edges toward the longitudinal centerof the section, the webs being of comparatively narrow Width andconnecting the bridge walls at the, points of maximum width of thelatter.

8. An inner tire section .comprising an approximately solid length ofresilient material formed to provide a series of air-cells openingthrough each side of the section and non-communicating, the'cells beingdivided by transverse brldge Walls and connecting webs, said bridgewalls being of maximum width on-the' longitudinal central line of thetire and sharply decreasing therefromito the free edges of said walls,the webs having a width corresponding to the minimum width of the bridgeWalls, the adjacent surfaces of the webs and bridge walls merging intoeach other on curved lines.

In testimony whereof, I aiiix my signature in presence of two witnesses.

D. W. GOULD, Bnnnn'rr S. Jones.

